|Found on the web...|
Can't update to Service Pack 3 on Windows XP (old computer)
"When I try to update to Service Pack 3 on windows XP I get the following error:
The file c:\windows\system32\drivers\acpi.sys is open or in use by another application."
Successful solution but OVERKILL !!!
Try this first.
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, or major Microsoft updates that cannot be installed automatically by Automatic Update, the software will not install properly, and you may get no indication of that at all while installing the software.
To avoid that possibilty, 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 AVG 2012 that's done under the title AntiVirus). 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 us which anti-malware software you are using.
When you are sure the software has installed correctly, re-enable the resident module(s).
How to disable your security applications
Installing SP3 updates is especially sensitive as to whether anti-malware modules are running !
Try installing the SP3 updates AFTER having done that.
If that doesn't help, then try running the programs at that first link I found, with the anti-malware programs you already have installed STILL disabled .
NOTE that it is against the rules of this web site to post logs of results of a program like the ones referred to at the first link I found.
If you want to be able to do that, then you must go to a web site that allows that, such as the one the first link's thread was on.