help me please

What to do if my browser crashes, even if I'm not looking for an antivirus. No applications are updated or installed, and when Dr.Web starts, error 2147614719 occurs, the Windows defender is also not updated, this is also an error, and so on with all antiviruses. And sometimes blue screens with memory management or page fault in nonpaged area take off altogether. Can you tell if it's a virus or something else? I have already tried to remove blue screens using instructions from various articles, such as checking the sfc / scannow and dism files, freed up space on the c disk, it seems like there are fewer of them, but when you enter the browser, a system crash immediately appears and all that remains is to turn off the computer through the button nutrition. In general, it can be a virus and how to fix the computer, if possible