Hi Ilya. Lets make sure there is no corruption in the file system.
Click Start< type
Command Prompt in the Start search box, right click on
Command Prompt and click on Run as administrator. After the Command Prompt window opens, type
chkdsk C: /r and hit enter. Type
Y to confirm that you want to schedule a Check Disk to run on the next restart. After the Check Disk has been scheduled, close the Command Prompt window and reboot the computer to allow Check Disk to run.
Then lets see what is starting up with your machine.
Please download
Autoruns. After you download the zipped folder on your desktop, right click the zipped folder and click Extract All. After the folder has been extracted open the regular folder. Run the autoruns.exe program by right clicking on it and selecting Run as administrator. When you open the program, click the Logon Tab and then post a screenshot of all the startup entries on the Logon Tab in your next reply.