ACAD LT 2012 – the error message always Pop-up

Hello Experts,
I tried to find the answer to fix this problem. When I want to SAVE AS and try to close the AutoCAD LT 2012 then the error message always Pop-up.
Please give me a number of suggestion, solutions and some steps to fix this problem. Already I re-install it 2 or 3 times but the error come out.
Please help.
Thanks in advance.
