BSOD and Bad Performance

[Innocence.]

Well, BSOD is caused by many things. One of the most common is overload of viruses or infections. You should try using MBAM (Malware Bytes) and run it in full scan. This will make sure it thoroughly and fully scans your whole computer. If it catches any infections, make sure you quarantine them all. Your computer could be running slow due to viruses as well, and also low computer space.