I'm not the network admin, but my network admin is having trouble solving this as well.
My issue is exactly as the title says...
Windows Security (In windows 7) keeps asking for my credentials, and won't "Remember my credentials"
Even if I check mark the box that says "Remember my credentials", I'll eventually be prompted to enter my credentials again.
I am an administrator for this computer.
Please let me know if there's any other details I can provide!