Pc lagg and internet lagg?

For some reason my pc was working exactly fine yesterday but somehow today it started to lagg and i can't even play flash games at addicting games cause the lagg is so bad also, I can't even play youtube video's because their so choppy and pause after 2 seconds although their already fully downloaded.

Here are my pc specs:

AMD 3800+ 2.2ghz

1GB RAM

160GB HARD DRIVE 95GB free space left

Running Shaw High speed internet

Antivirus is Shaw Secure which takes up very little memory.

-Ive already ran a disk defragmenter

-Disk Cleanup

-And a full Virus scan today (no viruses detected)

-And ive rebooted my computer several of times

Any other options??

Pc lagg and internet lagg?ariel

If your virus/spyware free, there are a couple things you can do get your computer working faster. If you using your computer for normal stuff and not gaming. You don't always need more RAM you just need to perform a few maintenance task.

First, if you haven't cleaned your registry in a while. This is necessary. Your registry holds all the information regarding updates, installs, un-installs etc. Each one of those events produces a key. That key needs your PC's resources and free space. So, if you clean your registry, you make more resources available for speed. Do a registry scan if you got more than 20 errors you should clean it.