After bringing my laptop (Toshiba with Windows 7) home from a friends house, I noticed my computer had frozen. Upon restarting, it has not run the same since, having almost unbearable slow start-up time that takes nearly ten minutes on just the Windows logo
screen, often crashing and mostly needing to restart. The few times I have managed to actually log onto a profile, it runs incredibly slow, taking minutes to perform even simple tasks.
A few times, I've received error messages that Microsoft Security Essentials had crashed and I've had black desktop backgrounds claiming my copy of Windows was not genuine (I bought this laptop from a Best Buy roughly 3 years ago with Win7 pre-installed).
I have read that the Windows not genuine message can be caused by errors in anti-virus software leading me to believe that might be the cause but I honestly don't know.
According to MSE and Malware Bytes, I don't have any viruses (I managed to run a full check on both, it took significant amounts of time). I'm also reasonably certain that it is not a hardware issue as I checked the inside of the laptop as well as diagnostics
and everything appears to be working as it should.
I'm planning on purchasing a new gaming PC within the next month and was going to use Win7 again for the OS but now I'm a little discouraged as I'm afraid there might be a problem with that too. Any would would be greatly appreciated and thanks in advance.