Mouse freezes when disconnecting from Internet

The mouse freezes when I click on the Disconnect button in the Remote Access Panel. It doesn't happen every time. I can't do anything but turn off the computer then boot it up again. Any ideas?
Power Mac G4 Cube   Mac OS 9.0.x  

Hi, Fuggles -
Since the mouse freezing appears to be specific to an action in OS 9, it should not carry over to OSX.
Some concerns about installing Tiger (OSX 10.4) -
• Firmware
Be sure you have updated the firmware in that machine before installing OSX. You can download the appropriate firmware updater from this Apple KBase article -
http://docs.info.apple.com/article.html?artnum=75129
<hr>
• OS 9 version
The preceding firmware update installs only when the machine is running OS 9.1 or OS 9.2.x from its hard drive. And, if you plan to use OS 9 as Classic under OSX, it must be at least OS 9.1; OS 9.2.x provides better compatibility for that mode.
Therefore, you should update your OS 9.0.x to at least OS 9.1, and perhaps to OS 9.2.x. You can do that using download updates, which you can get from these Apple pages -
Article #75103 - Mac OS 9.1 - Download and Info
Article #120030 - Mac OS 9.2.1 - Download and Info
Article #75186 - Mac OS 9.2.2 - Download and Info
Note that those must be installed in sequence; none can be skipped. However, you can skip the need to obtain one or more of those large downloads if you get a retail OS 9.1 or a retail OS 9.2.1 Install CD, and do a direct install of that version.
<hr>
• Startup Disk
The version of Startup Disk control panel that comes with OS 9.1 and earlier is not capable of 'seeing' OSX as a valid OS, hence switching to OSX from OS 9.1 or earlier can be difficult. However, there is a solution - download and install a replacement control panel, which can be got from this article -
Startup Disk 9.2.1 Document and Software
Note - in spite of what that article states, that replacement control panel will work in OS's earlier than OS 9.1; it as been tested successfully in OS's as old as OS 8.6. It is not needed for OS 9.2.1 or later.
<hr>
• RAM
The requirements for Tiger state a minimum of 256MB of physical RAM; a minimum of 512MB is more realistic. More RAM is better.
OSX is much pickier about RAM than OS 9 is. If your machine has any after-market (non-original) RAM in it, it would be a good idea to download and run DIMM First Aid. That utility can do some basic tests, but more important;y it can repair some sub-spec modules so that they are compliant with Apple's specs.
Note - do this before installing the firmware update mentioned above.
<hr>
• Hard drive space
Tiger will need about 3GB in order to install, and runs best when there is an additional 5GB of unused space on the drive (it uses that space for its version of virtual memory, swap files, defragging on the fly, etc.). It would be best if your hard drive has at least 8GB unused space on it before installing Tiger.

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