I have a Toshiba Satellite L675 laptop running Windows 7. Sometimes it won't boot properly -tells me to run Windows Repair which I do and it doesn't repair. It runs slow most of the time taking forever to load anything. When I click on Start Icon at bottom left all I get is a blank box and "Programs" at bottom. I click on Programs and it lists everything. In my Control Panel I have Internet Options and then a second Internet Options that says (32 bit). According to my system my laptop is 64 bit. I back up my entire laptop to an external drive - yesterday when doing this, I received an error saying there was part of "windows OS" that was missing and then it continued on before I could write it all down. I have my Windows 7 Disks - should I re-install that and if I do does it keep both copies of Windows or will the new install overwrite the old one? It just seems like I am missing something in windows or it is corrupted. I have done virus scans, registry scans, tracking cookies, deleted history, ran Disk Cleanup and Degrag, deleted all temp. files - just very confused. Yes the laptop is older but it's all I have right now and I cannot really afford a new one. Just to have someone look at it is like $100 - I am a senior and live on Social Security Disability so funds are limited so any help or answers is sincerely appreciated. Thank you.