I have a Lenovo 300 N200 (0769) Recently it has become very slow even though everything seems fine. I tried running defragmentation but on a check it said defrag not needed as there's a lot of empty space (C drive is just half full, while E and F have more than three-fourths empty). Please suggest a suitable solution

Try increasing the virtual memory setting in the windows operating system. Also see if there is a defragmentation tool on the windows operating system. I am assuming it is a windows operating system.
You may have a virus that might slow down or spyware slowing down p,c May need to run an anti spyware or anti virus program to check for these.

If you're positive you didn't unplug or rip anything while installing new USB ports, trying checking/updating or rolling back the drivers for the touch pad. Installing new USB ports could have mis-configured something and disabled or modified your drivers for the touch pad.

if it is a windows computer, try running defragmenter and disk cleanup.
to run defragmenter, in the search box in the start menu (in vista and windows 7) and search "defragmenter" select the c drive, and defragment it.. while you're at it, set up a weekly defragment with the defragmenter schedule.
To run disk cleanup, search for "disk cleanup" in the same search box. select the c drive, and check all the things you want to clean up.
you can always just do a scan with your antivirus to check if theres a virus slowing your system down.

There are so many reasons can cause your Lenovo T61 computer running slow than it used to, it is hard to identify just what might be dragging down your Lenovo's performance, let alone implement the necessary technical adjustments to fix it.

So if you want to address the issues more easily, I'll recommend you try a Lenovo speed up software, available here: http://www.speeduplenovo.com/

Over 10+ small utilities packed into one to help detect & fix all slowdowns in 1 click.

I usually never have that problem except if there are things installing or antivirus is running. This means it is because your computer needs to load too much details (because of the visitors and everything that is built). There is not too much you can do, except a few things that might make it slightly better.

A regular thing is defragmentating your computer, this will make your computer run programs faster. Mind that you can first uninstall all files on your computer that are useless, that you don't need. I am not sure about the version of your windows computer, but usually it's "Start" > "Control Panel" > "System Management" > "Defragmentate your hard drive" , then there should be a button "defragmentate now".

Slow moving screen is usually a cause of a slow computer, or a computer that has gotten slow. It is the common thing called "lag" on online games. So the only thing you can do is closing as much programs as possible that you don't need (try ctrl+alt+del, process tab and end what you don't need) for example msn or any antivirus.

There isn't a lot more you can do, maybe uninstalling, but I personally don't think it will have any effect. Try another computer maybe and see what it gives.

defragmentation is worth performing even tho it takes a long time, id look for a different software other than the windows defragmentation tool

some freeware here

http://www.snapfiles.com/Freeware/system/fwdefrag.html

hope it helps

there is possibly a heavy app running in the background, for example virus and malware scans, if you are running vista then you will have to expect this


regards

See there are limitations to Motherboard to support the amount of RAM. You must check out the motherboard manul to see how much maximum RAM you can have. The second issue as you think the speed will be increased, you are right but only if your softawre uses more memory than you have in RAM, because in this case OS swap the data from RAM to disk and it makes performance slow.

After all you can slightly increase the speed.

Thanks
Iqbal

If everything is working well on the PC and the Dragon software is newly having a problem I would try uninstalling it from Control Panel, then Add/Remove Programs and then reinstalling. Very odd that one piece of software would cause the PC to act slower. Does it use a lot of disk space? Maybe try a Disk Cleanup and Defragmenter (All Programs, Accessories, System Tools).