I installed a new mouse "Plain Old Microsoft Basic" (I have Win 98) no drivers even needed. It worked fine for several days.
Later I was sending fax using Winfax. System locked. Rebooted.
After the reboot mouse has had no Right Button?? Both "can be lefts" the real left takes two deliberate hard clicks to work as a left. The right acts as a left on the first click. If you switch the mouse from Right Handed to a Left Handed in the Control panel NOTHING works. Have to correct that with the keyboard. The mouse runs way too fast. I have to set Movement at the slowest to even use it. Click speed is a mess. Can't tell where that's at.
I've Removed the mouse several times. Windows finds it and installs the basic PS2 mouse drivers but it comes up with the same defect. When I remove it and restart "first" I get an Unknown Device message - then I get the "Found Mouse" message.
I switched to a serial port with an adapter. Windows find that too and installs the serial mouse driver. It still has the same problem. I tried TWO other mouses and the same problem. I disabled everything in Start Up. No change.
The IRQ is 12. It shows "No Conflicts"
A little while ago I totally reinstalled Windows 98 ...same problem
Then I switched the Keyboard & Mouse Connections since they're both PS2 ... rebooted ... same exact problem.
I am baffled and 100% stuck.