Recently bymistake I terminated some client service and the suddenly my comp went off and then when I restarted I got isass.exe error and the error stated something like... password string invalid or something I don remember
Luckily I had vista partition so by login in there I repaired xp by coping some files from windows/repair to windows/system32/config and my PC booted again but with the administrator username
Now the problem is I that I cannot access my user account which was the default account before and also had administration rights
The thing is that folder is still present in my documents and settings but I cannot opne that also because it says access is denied
Giv me solution how to sort this out... I want to be able to log in as my username folder and work with it and not this default admin id... theres nothing in it
I hv many imp documents and setting in that username id
Please help... is it because of some kind of virus ?

Not likely a virus. However, I'm not sure how you're going to get in. If you have administrative privileges, you need to run things as an administrator. In Vista, you often work at lesser privileges than administrative. I'm not all that familiar with Vista, but I'll give it a shot.

Right-click on the folder and select Properties. If at any time, Vista asks if you want to do this as an administrator, do that. Under Properties, select the Security tab. Select the Administrator you're working under and give yourself full privileges to access the folders.

Good luck,