I recently got a new motherboard, and installed it to my computer. I kept all of my old parts, including the HDD and SSD. The computer booted fine, and windows seem to run well. However, the old BIOS remains, and I have noticed that my internet connection, which is slow normally, seems exceptionally slow, and Google Chrome seems to be running much slower and consuming more memory. This may just be temporary, only time can tell. But I am wondering if I should delete the old BIOS and drivers, and if you guys think it is necessary to reinstall windows