Each time I start up the system the boot file cannot be found. I select the "Repair Start Up" option and it completes it successfully with following detail:
Root cause found: The partition table does not have a valid System Partition. Repair action: Partition table repair. Completion successfully. After this the system will start up. As mentioned, I have to do this at every start up, so I'm wondering why this partition table disappears when I shut down the desktop.
I should mention that this problem started at the time I downloaded and installed the True Image Backup software. The installation could not complete and one possible solution to the problem was to stop the antivirus program. At that moment I noticed that the avast antivirus was hanging and I was not able to kill the process. So I restarted the system, using f8 to get the safe start option so that I was able to uninstall the antivirus program. I then tried to install another antivirus application and when installation was almost finished got the message that it was unable to complete installation. I tried to install another Backup solution (Paragon), but also this one failed. On the other hand, I was able to install the Firefox browser.
Any help is welcome!