So my computer had been messin' up lately. Stuff like programs run slow, when I turned it on it didn't restart it just went right back to what I was doing(which took a long time) things like that. So anyway then I turned my computer on one day and the fans were turning and the "on" light was on but my monitor said "no signal". What's up with that? So anyway I tried the monitor on another CPU in the house and it worked. But I need the CPU in my room to work. Anybody got advice? (I'm not a tech geek so I don't know what ram is or a motherboard and stuff like that.)

Wow, that's a little too general a description of the problem for me. There are so many things that can cause slow issues but the lost signal for your monitor seems like a graphics card issue to me. I recently had a similar problem with my monitor and all the stuff I tried (re-seating the card, checking the DVI cord etc.) did nothing until I reset my bios to defaults and then it came back. But I have an MSI motherboard that has one of those external cmos reset buttons, and its been a problem since day one (that reminds me I should check for a bios update). You don't say much about your PC but if its more than a few years old it probably needs a good cleaning inside. Since your not tech savvy, it's probably a good idea to take it to someone who is, and pay them to clean it for you.

As for slow downs the issues can range from a failing hard drive or full C drive to fragmentation, over stuffed registry, or even virus infection. When I was a noob I would have reformatted and reinstalled at that point. Now since I use a registry cleaner on a regular basis, wipe files with a file wiper instead of using the Recycle Bin, and defrag the C drive every few months, I don't see the slow downs unless I get infected some how. Although I do download stuff to my C drive I do not keep the stuff there, I always move them to my D drive or E whatever and keep my C drive for the OS and installed program files only, so a defragmentation run is fairly quick. Since the other drives are storage only and do not run programs, they do not need to be defagmented except every few years if at all.

Could you be more specific about this statement:
"Stuff like programs run slow, when I turned it on it didn't restart it just went right back to what I was doing(which took a long time) things like that"
It is so twisted it makes no sense. You start by mentioning programs and then into restart. Programs restarting or PC restarting, I can't make heads of tails of that part of your question.

What operating system are you running? In most cases you can unistall programs you fon't need or set them to not launch at boot. You can also clean up andy viruses or malware. To be any more specific I would need to know what OS you are running