another thing is that my hard drive is slow, for example when I power my computer and enter windows my disk usage is at 100% and desktop takes 5 minutes to load all icons
Five Minutes is a long time. Why don't you post your system specs so people can evaluate ALL factors. First off, it seems you are running windows 10, or am I incorrect? Not all pc's will run windows 10 well from what I've read, and is one reason why I have not moved over.
I found that my startup was lean also, but things were still slow. TsVk! suggested that I download MiniToolBox, here is his quote:
"Please download MiniToolBox, save it to your desktop and run it.
Checkmark the "List Installed Programs" checkbox and run it.
Copy and paste the log in your next reply."
I was able to gain 40secs on boot time by removing many bloatware programs with Revo. Make sure to research what you are removing before you proceed. But if your HDD is failing all bets are off. I've been having issues already, with writing large files to Folders and Installing a new OS to the end of drive, both failed.
You could also take a look at this.