Can't mount dmg. But works under new user

Question

All of a sudden I can not open any dmg-Files anymore.
I just get a timeout error message:
I tried the following already without success:
- restart
- repair permissions
- safe mode
- open via terminal command
A work around - but not a real solution - is no create a new user.
I would be glad for any suggestions to solve the issue.

Answer 1

ok, this is the result:
btw I really appreciate your help in any case :
Last login: Sat Feb 23 00:00:22 on console
localhost:~ vallorentz$ kextstat -kl | awk '!/com\.apple/{printf "%s %s\n", $6, $7}'
com.rogueamoeba.InstantOn (6.0.2)
com.antecea.driver.AnteceaAudioDrv (1.0.0)
com.avatron.AVExVideo (1.7)
com.rogueamoeba.InstantOnCore (6.0.2)
com.avatron.AVExFramebuffer (1.7)
com.sophos.kext.sav (8.0.4)
org.virtualbox.kext.VBoxDrv (4.1.18)
org.virtualbox.kext.VBoxUSB (4.1.18)
org.virtualbox.kext.VBoxNetFlt (4.1.18)
org.virtualbox.kext.VBoxNetAdp (4.1.18)
com.regularrateandrhythm.driver.RowmoteIREmu (1.0)
localhost:~ vallorentz$ sudo launchctl list | sed 1d | awk '!/0x|com\.(apple|openssh|vix)|edu\.mit|org\.(amavis|apache|cups|isc|ntp|postfi x|x)/{print $3}'
Password:
com.sophos.notification
com.sophos.intercheck
com.sophos.autoupdate
com.schomaecker.qpilot.client-service
com.regularrateandrhythm.rowmotehelperaide
com.oracle.java.Helper-Tool
com.noiseindustries.FxFactory.helper
com.microsoft.office.licensing.helper
com.google.keystone.daemon
com.elgato.eyeconnectd
com.bresink.system.securityagent
com.adobe.SwitchBoard
com.adobe.fpsaud
localhost:~ vallorentz$ launchctl list | sed 1d | awk '!/0x|com\.apple|edu\.mit|org\.(x|openbsd)/{print $3}'
com.marketcircle.BPSyncHelper
com.wacom.pentablet
com.sophos.uiserver
com.schomaecker.qpilot.client-gui
com.oracle.java.Java-Updater
com.google.keystone.system.agent
ws.agile.1PasswordAgent
com.spotify.webhelper
com.google.Chrome.framework.service_process/Users/vallorentz/Library/Application _Support/Google/Chrome
com.facebook.videochat.vallorentz.updater
com.ecamm.printopia
com.adobe.ARM.df0ab5bbe6f698196fcc21e3c1e66dcb758bd911f4d637272d9d8109
com.adobe.AAM.Scheduler-1.0
localhost:~ vallorentz$ ls -1A /e*/mach* {,/}L*/{Ad,Compon,Ex,Fram,In,Keyb,La,Mail/Bu,P*P,Priv,Qu,Scripti,Servi,Spo,Sta} * L*/Fonts 2> /dev/null
/Library/Address Book Plug-Ins:
mSyncABSMSPlugin.bundle
/Library/Components:
/Library/Extensions:
VBoxDrv.kext
VBoxNetAdp.kext
VBoxNetFlt.kext
VBoxUSB.kext
/Library/Frameworks:
AEProfiling.framework
AERegistration.framework
Adlm.framework
Adobe AIR.framework
AudioMixEngine.framework
NIKit.framework
NyxAudioAnalysis.framework
PluginManager.framework
SAVI.framework
SUMScanKit.framework
WacomMultiTouch.framework
iODBC.framework
iODBCinst.framework
iTunesLibrary.framework
/Library/Input Methods:
/Library/InputManagers:
Ecamm
/Library/Internet Plug-Ins:
AdobeAAMDetect.plugin
AdobeExManDetect.plugin
Flash Player.plugin
JavaAppletPlugin.plugin
MeetingJoinPlugin.plugin
Quartz Composer.webplugin
QuickTime Plugin.plugin
SharePointBrowserPlugin.plugin
SharePointWebKitPlugin.webplugin
WacomNetscape.plugin
WacomTabletPlugin.plugin
flashplayer.xpt
googletalkbrowserplugin.plugin
npContributeMac.bundle
npgtpo3dautoplugin.plugin
nsIQTScriptablePlugin.xpt
/Library/Keyboard Layouts:
/Library/LaunchAgents:
com.adobe.AAM.Updater-1.0.plist
com.google.keystone.agent.plist
com.oracle.java.Java-Updater.plist
com.schomaecker.qpilot.client-gui.plist
com.sophos.uiserver.plist
com.teamviewer.teamviewer.plist
com.teamviewer.teamviewer_desktop.plist
com.wacom.pentablet.plist
/Library/LaunchDaemons:
com.adobe.SwitchBoard.plist
com.adobe.fpsaud.plist
com.apple.serverd.plist
com.bresink.system.securityagent.plist
com.elgato.EyeConnect.plist
com.google.keystone.daemon.plist
com.microsoft.office.licensing.helper.plist
com.noiseindustries.FxFactory.helper.plist
com.oracle.java.Helper-Tool.plist
com.regularrateandrhythm.rowmotehelperaide.plist
com.schomaecker.qpilot.client-service.plist
com.sophos.autoupdate.plist
com.sophos.intercheck.plist
com.sophos.notification.plist
com.teamviewer.teamviewer_service.plist
/Library/PreferencePanes:
Air Display Preferences.prefPane
AirServer.prefPane
Flash Player.prefPane
Hazel.prefPane
JavaControlPanel.prefPane
PenTablet.prefPane
/Library/PrivilegedHelperTools:
com.bresink.system.securityagent
com.microsoft.office.licensing.helper
com.noiseindustries.FxFactory.helper
com.regularrateandrhythm.rowmotehelperaide
com.regularrateandrhythm.rowmotehelperaide-kext
/Library/QuickLook:
QuickLookEyeTV.qlgenerator
iBooksAuthor.qlgenerator
iWork.qlgenerator
/Library/QuickTime:
AppleAVCIntraCodec.component
AppleHDVCodec.component
AppleIntermediateCodec.component
AppleMPEG2Codec.component
AppleProResCodec.component
DVCPROHDCodec.component
EyeTV MPEG Support.component
FCP Uncompressed 422.component
IMXCodec.component
/Library/ScriptingAdditions:
Adobe Unit Types.osax
/Library/Spotlight:
Microsoft Office.mdimporter
iBooksAuthor.mdimporter
iWork.mdimporter
/Library/StartupItems:
VirtualBox
/etc/mach_init.d:
/etc/mach_init_per_login_session.d:
/etc/mach_init_per_user.d:
com.adobe.SwitchBoard.monitor.plist
Library/Address Book Plug-Ins:
.DS_Store
SkypeABDialer.bundle
SkypeABSMS.bundle
Library/Fonts:
CorporateS-Regular.ttf
EY-LLP__.TTF
EYIFONT_.TTF
EYKLL___.TTF
EYTag_TT.ttf
EYlo000.ttf
Eygcmb_t.ttf
Eygcmbot.ttf
Eygcmd_t.ttf
Eygcmdot.ttf
Eygcnd_t.ttf
Eygcndot.ttf
Eygcnm_t.ttf
Eygcnmot.ttf
FontAwesome.otf
Handschrift Valeri.ttf
ITCEDSCR.TTF
LT_14375.TTF
MeliorCom-Bold.ttf
PALSCRI.TTF
Sabon-Roman.ttf
Univers-Light.ttf
lt_14361.ttf
lt_14363.ttf
lt_14373.ttf
lt_52138.ttf
lt_52139.ttf
lt_52140.ttf
lt_52141.ttf
lt_52142.ttf
lt_52143.ttf
tobheadline.ttf
Library/Frameworks:
EWSMac.framework
Library/Input Methods:
.localized
Library/Internet Accounts:
V1
Library/Internet Plug-Ins:
FacebookVideoCalling.bundle
Library/Keyboard Layouts:
Library/LaunchAgents:
com.adobe.AAM.Updater-1.0.plist
com.adobe.ARM.df0ab5bbe6f698196fcc21e3c1e66dcb758bd911f4d637272d9d8109.plist
com.apple.AddressBook.ScheduledSync.ABExchangeSource.8D740F13-E2E3-478C-B5B1-B46 714837480.plist
com.apple.AddressBook.ScheduledSync.ABExchangeSource.A0B7299E-0FEC-4BE6-B5CA-61A 9D3EF4A35.plist
com.apple.AddressBook.ScheduledSync.ABExchangeSource.E21820E3-E409-41AC-81AE-575 1793F3C7F.plist
com.apple.AddressBook.ScheduledSync.PHXCardDAVSource.38F8BE74-BAF5-4919-9D25-0BB A90369ED3.plist
com.apple.AddressBook.ScheduledSync.PHXCardDAVSource.488E3588-E3BB-4FC3-B2C5-AA8 1117C08D9.plist
com.apple.AddressBook.ScheduledSync.PHXCardDAVSource.65079D93-2A6A-4AB2-B49B-961 7A1BF4C31.plist
com.apple.AddressBook.ScheduledSync.PHXCardDAVSource.A6B9F8F8-EA10-4D29-8E65-384 A4AED1F5B.plist
com.apple.AddressBook.ScheduledSync.PHXCardDAVSource.DEAFA9C7-0207-4B69-9AED-799 F4A5077B4.plist
com.apple.AddressBook.ScheduledSync.PHXCardDAVSource.F9137599-7250-4028-AB1C-52C AB8BF4A0C.plist
com.apple.FolderActions.enabled.plist
com.apple.FolderActions.folders.plist
com.apple.serveralertproxy.plist
com.ecamm.printopia.plist
com.facebook.videochat.vallorentz.plist
com.google.Chrome.framework.plist
com.spotify.webhelper.plist
org.virtualbox.vboxwebsrv.plist
ws.agile.1PasswordAgent.plist
Library/Mail/Bundles:
DEVONMailConduit-SnowLeopard.mailbundle
Library/PreferencePanes:
Printopia.prefPane
Library/QuickLook:
Library/Services:
.DS_Store
DATUM -> iCal.workflow
ENService.app
LingueeSearch.service
Library/Spotlight:
EndNote.mdimporter
localhost:~ vallorentz$ osascript -e 'tell application "System Events" to get name of every login item' 2> /dev/null
Citations, Arq Agent, Doodle iCal Connector, iTunesHelper, EyeTV Helper, SpeechSynthesisServer, Rowmote Helper, Dropbox, HazelHelper, Moom, TextExpander, Telefon, DEVONthink Sorter, AirDisplayStatusItem, ScreenCapture
localhost:~ vallorentz$