Every time I attempt to start up my Windows 8 HP laptop, the computer's lights turn on, but the screen stays dark and the Caps Lock button flashes. Following another internet recommendation, I unplugged the computer, removed the battery, and held down the power button for a few seconds. After doing this, my computer powers up successfully and I am able to access my desktop, and the machine is connected to a strong WiFi signal, but I cannot load any pages in Chrome. Lately, if I attempt to run any kind of program, or remove programs (as I have been trying to eliminate suspects), I get the "Your laptop needs to restart " and the error message "DPC_WATCHDOG_VIOLATION". It finishes collecting error data and then the screen shuts off, but the lights and fan continue running and don't stop. I've been holding down the power button and starting the process all over again, which is probably very stupid and is getting me nowhere. I recently had a problem with a Bing advert toolbar popping up on certain websites, and I couldn't get rid of it using my normal methods, so I tried out an antivirus my friend used, admittedly with almost no real knowledge of the software. The antivirus is called Comodo, and I don't like it, to be honest. It downloaded some other programs that were made by the same developer or a partner, and seemed harmless, but they were annoying and unnecessary. I wonder if Comodo or a related program is the culprit, as they were downloaded just before I started having problems. Please help, I am exceedingly frustrated and I need this computer for work.