I have 2 lap tops & I can't open task mannager on eather computer I. tried everything.
Are you talking about XP?
Are both user accounts "Administrator" and not limited?
Some Viruses can disable Windows components, I'd try running an up to date Virus scan, something like this is OK though a bit limited http://vil.nai.com/vil/stinger/ but free!
If that doesn't help, I'd suggest going through these steps: http://www.techspot.com/vb/topic47776.html
Task mannager problems
The Dell lap top has Xp 20000 and the HP lap top has Windows Vista 2007 neather one has Adminsitrater limited
If the stinger route did not get you up and going, see if this solution helps you. This little utility will re-enable task manager when some malware(s) out there disable it.
Go to the site from either of these addresses and get a little program/utility which will allow you to enable task manager again. Best to you...
Best to you...