PhotoShop CS5 (PS CS5) will not start

Question

While configuring PS CS5, I removed the check
mark on my c:\scratch disc because I do not want
scratch files running on my systems disk. I kept
the scratch disks on my e:\, k:\, and g:\ drives and
configured them to be used in that order by PS
CS5.
After completing the configuration, I restarted PS
CS5. Now, when PS CS5 starts the initialization
process and begins to load the scratch disks, the
startup routine fails.
I get a dialog box with an Adobe Photoshop CS5
Extended error box, which contains a red circle
with an X that indicates an error, and the message
"Could not open a scratch file because the file is
locked or you do not have the necessary
privileges. Use the 'Properties' command in
Windows Explorer to unlock the file."
First the dialog box does not name the file to
unlock, so I do not know which file suffix indicates
what is and what is not a scratch file. Secondly, I
do not want to use my system drive, c:\, for a
scratch disk. Finally, how do you configue PS CS5
to properly restart, after the scratch disk
configuration is changed, after installation? This
seems to be the primary problem and I have never
observed it in any other release.

Answer 1

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[email protected] wrote:
The other problem is that there does not appear to be any means to make a scratch drive on any drive, unless you also make one on the system drive, which is c:\. If you do not make a scratch drive on c:\, you will get the same error that I posted about.
Hi Luther, what you say isn't the normal case.  I actually have my scratch drive pointed at D: only and don't see the problem you are seeing.
It still sounds as if Photoshop cannot write to your other drive.  These kinds of problems can arise if a disk is moved from a system to another system, or if a different user sets up the system initially.
Do you see the problem if you start Photoshop via "Run as Administrator" (as Kathleen suggested above), or temporarily reduce your UAC level?
Keep in mind you're not actually running with privileges on Windows 7, even though your account may be an administrator account.  You have to elevate the privileges (or disable UAC, which has some downsides if you don't fully understand the security model).
-Noel