CHYAME KANCHA Yes you can delete those log files, No problem. Log files are nothing but just a report over software installation, or some system info that went well or bad. To monitor your system, you can Rightclick on "My Computer" and choose "Manage". System management consul will open. Click on the "+" sign on "event viewer" here you can monitor what is happaning , and what has happened on your pc. If you are uncertain of deleting a file, just move the file somewhere else like i.e D:\ and reboot your PC. If the file is in the system root, and are important, then system cannot allow you to delete them. If there are files that should not be in your PC (Google to find out),and you cannot delete them, then you will have to start in a same mode, or ERD (Emergency recovery disc) tools. But the Best way to keep your system clean, and this is what I do, Is have aclean Installation, with only windows and office pack and all the updates. and take a Ghost Image of it and keep it. Then after you can install what ever you want. To clean the system again, just run that image over, which takes Max 5 minutes, and you have a complete new and fresh installation. Long story short. Yes you can delete them. Good night, gotta go to bed, too much whiskey already.