I'm with neemo here. It's more likely windows corruption, virus/malware infection (have you scanned your PC for viruses recently; updated the definitions?), or even more likely it's a failed hardware component such as your hard drive. Your W7 system is at least 6 years old; hard drives only last 3 years in desktop PCs, only 2 years in laptops. If you've never replaced your hard drive since you opened that computer from the box it came from; you have an 85% that the hard drive is failing and or failed!! You should consider testing your hardware. I was streaming Netflix on W7 for a year before I upgraded to W10, and it worked just fine once I changed my ISP to get better Internet speed (went from 7Mbps to 65Mbps). This on an 8 year...