|If the same mouse connected the same way worked fine before you installed the SP2 updates, ignore this first part and see below. |
What type of mouse is it ?
Corded USB or PS/2 or Serial, or is it wireless ?
If it's an older wireless mouse, you usually must install software in order for it to be detected.
If you are using an adapter with a corded mouse to adapt it to a different type of port, it won't work with the mouse on any computer if the mouse is not a "combo" mouse that is designed and wired up to be used with both types of connections, and the adapter must be one for a mouse, usually that's green, not one for a keyboard, usually that's purple.
The USB female to PS/2 male adapters are universal otherwise, but there are several possible internal wiring arrangements for Serial (9 pin) to PS/2 or visa versa adapters - the internal wiring must be correct for the particular mouse.
It is a VERY GOOD IDEA to DISABLE any resident modules of anti-malware programs BEFORE you install SP1, SP2, or SP3 updates, otherwise you are a lot more likely to have problems after they have been installed.
NOTE that sometimes the resident module(s) of anti-malware programs - a part that runs all the time scanning for suspicious activity - will interfere with the proper installation of third party software, the software will not install properly, and you may get no indication of that at all while installing the software.
To avoid that possibility, you should always DISABLE the resident module(s) of anti-malware programs, BEFORE you install third party software (software other than most Microsoft Updates, etc., that did not come with Windows ), especially when it's a major or complicated software package.
E.g. if you are using the free or paid version of AVG, you should disable the Resident Shield in AVG's 's settings in Windows. In Norton (Symantec) products, there may be several things you need to disable, or set so they don't load for a specific short amount of time.
If you don't know how to do that, tell me which anti-malware software you are using.
When you are sure the software has installed correctly, re-enable the resident module(s).
Not disabling the resident module(s) of anti-malware software before installing SP3 updates is a well known reason that people have problems after they have been installed - the same probably applies to installing SP2 updates.
If the mouse was working fine before you installed the SP2 updates, and if you DO have one or more resident modules that you did NOT disable before installing the SP2 updates, then you should disable that (those) resident module(s), Un-install the SP2 updates, then install them again.
For that matter, if your XP installation shows that it has SP1 updates in System Information after you have un-installed the SP2 updates (e.g. Start - Run - type msinfo32, click OK - that's shown on the right side of the screen) than you should be installing SP3 updates rather than SP2 updates.
(If your XP CD does not have any SP updates, you will have to load SP1 or SP2 updates before you load SP3 updates.)
However, if you DID get errors reading files from the CD during the Repair installation, you must fix whatever caused the problem, then run the Repair installation again. See next.
Running the Repair installation procedure can't fix all problems, but it's a good thing to try first rather than re-installing Windows from scratch.
"...the repair reinstall had produced tons of errors...."
You should get NO ERRORS AT ALL when reading files from the CD during Setup. If clicking on Retry or similar does not help...
If you DO / DID get errors, something was not right !
See Response 7 in in this,
"Errors reading from the CD can be caused by....."
"It sounds like you were running win xp with sp1 or no service packs at all. "
I have tried running the Repair installation procedure with several regular Microsoft OEM (not brand name supplied) XP CDs that have no SP updates. In all cases, the second Repair choice did NOT show up in Setup. The second Repair choice WAS there for the same Windows installations if the CD had SP1 or later updates integrated into it. I suspect it's only available if the CD has SP1 or later updates integrated into it.
Regular Microsoft XP CDs have SP2 or SP3 printed on them if they have those updates included. All the regular Microsoft XP CDs that have SP1 updates included that I've seen DO NOT have SP1 printed on the CD, but the volume labels - the labels you see for the CD in Windows - for CDs with SP1 updates included are different from those with no SP updates at all - you can search using that volume label to determine whether it has SP1 updates or not.
XP re-installation CDs that come with brand name computers usually have SP2 or SP3 printed on them if they have those updates and they may have SP1 printed on them if they include those.