Installation Problem

Hello,


I am facing 2 problems, first whenever I try to Install any software on my XP based pc, the install wizrd appers for may 2 secs and vanishes then if i try it say there is already setup in progress which never completes. 2nd I cannot see my hidden folders when I got to tools folder option and enable view hidden folders it is not getting active. I try o regedit also but the windows open for a second only then vanishes and then I cannot open it again.

Help me to get over this problem.