Super slow computer

My computer was fine somewhat, a tiny lag but I have hi-speed om road runner. I also have little memory only 64 MB and an intel celeron processor. I have 9.30G hard disk with 6.81 G of free space. I have ad-aware installed as well as spyBot S&D and EZ Armor which I did not use the pestpatrol cause I had problems with it. So I dended o spybot and adaware.I also would run panda active scan. I additionally also have cws shredder on my pc I did that cause sometimes I could run panda and sometimes not, it would not let me. And afraid I could not get download it again. I also have run multiple times trendmicro's anti spyware and also housecall. Now I can't even download trendmicro anything. It says,downloading unsuccessful; server busy or bad traffic and to try again. It never goes through. It only shows what I have downlaod so far and it's always like an inch and a half and never more. I also could never download HJT. And still can't. Up until three days ago, my pc ran ok till it got so slow. So I ran shredder and trendmicro woul't let me and neither would panda and after I ran my EZ antivirus and spybot and ad-aware. No results. So I went out and got pestpatrol since I cannot even see the roadrunner download page where I must get my free pestpatrol. I installed it and it scanned and no results. I don't know what to do and not pc savvy. I am afraid to go through the system restore insafe mode as I h no idea what to do and afraid to do anything without professional walkthrus. Any advise would help. I don't know if you could, being that I cannot download HJT. It says I am not authorized to ass it. Please help. I require a dedicated troubleshooter as I do not have much to go by.

OK, this is just weird. I had tried to reboot in safe mode and then it rebooted in normal mode cause I forgot I couldn't select the number to get into safe mode cause my keboard and mouse won't work. I have to use my old standard beige ones.*shrug* I don't know why. But anyway, I thought to check to see if it was still slow and it seems fine. Which confuses me that I had previously had to reboot because it was so slow even before I posted here. And the slowness still showed. But now, it is quick as it use to be. Only thing is I thought "Hey, maybe I can download hijackthis.exe And it says I don't have authority to view that page. So. I try to check maybe I need to check if I any of my programs aren't allowing it to go there. I came up empty handed. But one thing is when I rebooted my pestpatrol did not come up and I had it set to load and protect upon starting my pc. So I had to click start and go to programs and get it to load and protect and it wasn't protecting as I had it instructed it to do before I rebooted. And I set it to protect and clicked apply but the ad-watch blinked on and off and even when I clicked ok it still blinked again. So I go to adwatch and it says registry modification detected. I don't know…is that a false positive from ad-watch? I just want to be able to DL HijackThis so you guys can check it out. But I'm wondering maybe I have to many antispyware on here. So the update is no slow, just can't DL hijack this so I can be reassured.

Ok, update. Since I posted yesterday I have not rebooted or anything and my pc is now slowing down again. I even had trouble getting this thread to come up. It did as one of the sites I go to(roadrunner's downloads page). It had said done at the bottom of the page but nothing was there, it was all white. Only I got lucky, I refreshed and it took a while and it finally came up. The roadrunner page that has all my free downloads for ez armore as well other stuff didn't come up after I refreshed. So ere I am posting that it's slow. I don't want to reboot everday just to keep it quick. And like I said, all my antivirus and spybot and ad-awareand ad-watch and pestpatrol scans are clear. But the only one that really could catch anything would be trendmicro's housecall and spyware scanner that shows security risks as well, and I can't even get those to run. Panda won't run either. So, am I just stuck like chuck?

ok, I believe I defiitley have some malware or a hijacker. My pc will be fine and then as it goes from screen saver to stand-by it, I usually can bring it back on from there. But sometimes I can't get it to come on, or reboot. I have to resort to power switch off. Now, as I cannot download HJT and offically saying I can't download any site where anti-spyware is at. That includes www.download.com and even my own roadrunner download page. As for like panda,trendmicro, and a few others. It will let me down it but unable to run it. After I click it to run it, it lightning fast shows that it's done but really never scanned. Also, I have about:blank for my homepage and cannot change it no matter how many times I do it. So I did just take a look in my registry and found something lpt$vpn.797. I goolged it and it was in relation to spyware. So what should I do? Just take it to GeekSquad and they may have to thoroughly check it out? What do you reccomend?