There's a spyware/malware tool that's completely free and trustworthy called Spybot Search and Destroy.
I've been using it since about 1998 and it's still my favourite. Read the attached PDF for install instructions, download link and other information. It's part of a tutorial I wrote on desktop help.
Whoopsie. PDF's not allowed. OK - here's the lot in text:
Spy Ware
This is the other biggest problem that Windows has. Spy Ware is software that's designed to run in the
background of your Windows and collect marketing information from you, which it sends back to it's maker. On
the surface that seems innocent enough, and it mostly is. Except that you end up with so many spywares
running that your computer becomes crippled. They're not viruses so your antivirus program won't touch them.
And the people that make these spywares really don't care if your computer gets slow and buggy just so long
as they get information.
This information is worth so much money to them that they write very sophisticated programs that hide from
msconfig and are very difficult to remove, you need special software to hunt them and remove them. Popular
antivirus programs like Nortons and McAfee now come with what they tell you is spyware removal, but that
marketing information from that many millions of computers really is worth an incredible amount of money, so
they still leave the spywares of the large corporations that financially sponsor them. These large corporations
are responsible for most of the spyware, all of them. Canon, Brother, Hewlett Packard, Microsoft, Sony Corp,
Nokia, iPhone, Toshiba, Asus, every single one you can imagine. They all do it. There are no exceptions.
So you need a spyware removal tool that you can trust. There's only one that I trust, and it's free. It's called
Spybot Search and Destroy and I've been using it since about 1997. You can get it from
http://www.safer-networking.org/mirrors16/This is for the older 1.62 version but it still does the same job as the newer one. The difference is that the
graphics aren't as fancy so the program runs quicker and you have the option of not installing a couple of
components. There's a couple of components that come with SpybotSD that you don't want. They are called
“SD Helper” and “Tea Timer”, they run in the background all the time checking every file and web page for
spyware and this slows your computer down.
So when you install SpybotSD you want to choose the Custom Install option and untick those two
components. You will also need to be connected to the internet when you install it because it won't run until it
has done it's first update. The installer program will end by asking if you want to run SpybotSD now, tick NO
because you need to run it as Administrator.
Do a right click on the SpybotSD icon that's been put on the desktop and in the little pop up menu choose “Run
as Administrator” so that SpybotSD has permission to remove spyware.
The first time you run SpybotSD it'll give you a “wizard” with questions to go through.
Yes, you want to create a back up of system registry. It always pays to be careful and spybotsd can use that
backup to undo any changes it's made if necessary.
Yes, you want to check for updates.
Yes, you want to “Immunise” the system. This rewrites the configuration files for your web browsers such as
Internet Explorer and Firefox to prevent them from automatically installing a lot of these spywares. Very nice.
Once you've been through that and the main program window is up you'll notice a menu of buttons down the
left hand side including Update and Immunise, but you want the one at the top, when that's open you'll notice a
button in the right hand panel that says “Scan”, click that. It'll take about 20 or 25 minutes to scan the whole
system, when it's finished scanning a new button will appear at the top that says “Fix”. Click it to remove
spyware.
It's not uncommon to have several hundred spywares running in the background on an average home user's
computer. Some are so cleverly written that they can't be removed whilst Windows is running, if this is the case
SpybotSD will pop up a message telling you about it and will offer to start itself before Windows has fully
restarted. Do This. Click yes and restart the computer. SpybotSD will start up before the Windows desktop
appears, and the desktop won't appear until SpybotSD has finished. You have to do the whole 25 minute scan
again but it really is the only way some of the spywares can be removed.
You should now notice a massive difference in speed of the computer and the internet.