Windows 7 windows restore

Hi any computer bods out there?

I had a problem with my computer and had to try and do a system restore, i have just installed windows 7 about 2 weeks ago and this is working ok but it could not load my profile this morning (which happened periodically on Vista as well) and i normally just do a system restore and it rectifies the problem but when it did it today when i tried to do the restore it came up with Windows cannot find file C:\windows\system32\rsrui.exe make sure it is tyed correctly and retry.

I managed to restore it after a fashion but has anyone any ideas what this means or if i can do anything to resolve it should i have to do a system restore again.

Thanks

Carrottop10