CatByte
You may wish to try StartupLite. Simply download this tool to your desktop and run it. It will explain any optional auto-start programs on your system, and offer the option to stop these programs from starting at startup. This will result in fewer programs running when you boot your system, and should improve performance.
If that does not work, you can try the steps mentioned in Slow Computer/browser? Check Here First; It May Not Be Malware.
Also try a defrag
Download and run Auslogics Disc Defragmenter
If that does not work, you can try the steps mentioned in Slow Computer/browser? Check Here First; It May Not Be Malware.
Also try a defrag
Download and run Auslogics Disc Defragmenter