So recently my computer started freezing randomly and being very slow, It takes about 5 minutes for it to start up and I have never had an issue with that, usually takes about 30 seconds or less for it to start up and load. For some reason when I tried running sfc /scannow it stops at 17% and says that it was unable to continue, I ran the Memory Diagnostic, everything seemed to be fine. Ran a full system scan for malware, everything seemed to be clean as well. What can I possibly do? Laptop has been running perfectly for almost 3 years now and I do not feel like buying a new Windows 8 laptop. Any ideas?