please, if you can help, please do! I dunno what to do!

Okay, well first of all, I'm 16 and this is my laptop. now, i've been scolded before about the amount of stuff I have on here, but I can't help it! I have a LOT of music files, picture files and video files (amv maker here) I always thought my laptop could HANDLE it since it has a vast vast memory. but a few days ago I couldn't LOG into my account. I started my stopwatch and by the time I was finally on my account and ready to try to get on the internet, 15 minutes had passed. and some sounds COME out crackly and BROKEN, like the log-in chime.

I panicked, and did all i could think of to try and get rid of the problem, I ran the Defragmenter (it took almost all night and most of the next day to do so) and a system scan. both were done and came up clean. The computer still runs slowly and crackles on login.

I tried to use my microphone on it as well and my recordings came out garbled, cut off and crackly as well. it's not the microphone, which worked properly on my parent's computer.

I thought maybe I simply didn't have enough Ram or memory. I deleted a lot of superflous files and programs in the hopes that freeing up memory would allow the system to run better. No luck. My parents refuse to take the computer in to be fixed because they just finished paying for it a few months ago. I've had it for 2 years and it's always run fairly smoothly.

For most of the summer I haven't been properly shutting down, because the computer almost never turns off when i do it properly. the screen stays on the blue "shutting down" screen and doesn't shut off. could this have messed with the hardware or programming?

I'm almost positive I have no viruses. my virus scans have picked up nothing. i've done everything I could think of that would help relieve the problem and it's still there. I'm afraid this may be a hardware issue, some piece that's faulty or something, and if that's the case, I can't get it fixed. if someone could shed light on what may be wrong, please do! I'd really appreciate any help anyone could give me!

I will be needing this computer for schoolwork and research as school resumes, so I need to solve this problem quickly!

please and thank you!

Luckiybeckiy

P.S.

also, Windows Movie Maker opens, but any clip I put on the timeline goes BLACK and doesn't show, then shortly thereafter the program freezes. I don't know if this has to do with the above problem, since I know how unreliable WMM can be, but it's never done this before.Dont worry , just wait for sometime and your problem will definately be solved (a lot of light will be shed ), just dont worry and be patient, the guys will be coming soon. what's you computer specs?OS,RAM,Hard Drive Size?always give 15% empty space in your HD,have you try check your device manager?is everything ok?and doing stuff like movie maker do need a lot of memory.With more specific information about your computer we can help you get that resolved. If I had to venture a guess based on what you are telling me I would have to say it sounds like it could be hard drive. It may be a little too full. But once we get more specific info from you we can better diagnose your issue.