Hi i run a computing company in kent and will be moving to spain shortly.
I will outline below what I recommend doing for pcs that have or have had virus’s.
Things to have are a full copy of whichever version of windows you have, ie home or professional and service pack 1 or 2.
You will also need a working internet connection or a means of getting programs on the system such as a friends computer and usb flash drive.
The programs I use are as follows:
AVG Free
Tuneup utilities 2007
ccleaner
superantispyware
You can find these programs on http://www.download.com or by ‘googling’ them.
These programs are ones I selected for a balance of functionality, ability and minimal after issues. Afterall if I am fixing a clients computer system I dont want to fix one problem and cause another at the same time, which I found similar alternative programs occassionally did.
If you have service pack 2 you will have a built in firewall which I believe is inbound only so not great for stopping trojans but for most people it is sufficient, especially if connecting via a router which will have a built in firewall as well.
Ok, firstly download a fresh copy of AVG as the first point of attack in my experience for virus’s etc is your security programs, it may appear that your program is functioning but downloading a new copy will eliminate this potential risk. Uninstall all old security programs, norton and mcafee are awful and cause more problems than they fix, so even if you have paid for these remove them and use avg. Avg is by no means the best antivirus, but with a little common sense it can be ample for most people. It also cannot be minimised the factor or cohabiting, and I have found avg to ‘play nice’ with most other programs, whereas norton and mcafee will try and take over your system.
Once avg is reinstalled, update it and run a full system scan.
Then download and install ccleaner, you will want to run cleaner, ticking the box accepting that it will be deleting things from your computer.
This will clean up your temp files etc which is a common place for virus’s etc to hide.
Secondly download and install superantispyware, i used to use a combination of lavasofts adaware and spybot search and destroy, but found superantispyware to be very effective and I only use more than one program now if problems still exist after scanning with superantispyware.
update the program and then run a full system scan and click next when finished to remove any found spyware.
By far my most favoured program for fixing issues with peoples computers is tuneup utilities, download and install this. Go to cleanup and repair then to tuneup registry cleaner.
This will scan the registry for erroneous entries and give you the opportunity to remove them, it even scans again after to check that by it removing entries it has not subsequently caused more problems.
Once you have done this, place your windows cd into your cd/dvd drive and go to start> run> type ‘regedit’ click ok.
The registry editor should appear, you will see five categories, root, user, local machine…
Click on the + sign to the left of ‘HKEY_lOCAL_MACHINE’ to expand the options and repeat this on the following ‘folders’
Software>
microsoft>
windows>
currentversion>
This time instead of clicking on the + click on the actual ‘folder’ called ‘setup’
The contents of which should appear in the window to the right.
You are interested in the bit next to ‘sourcepath’.
You want it to be your cd drive letter, most computers will be D:\
If it is set to c:\ check on your c:\ drive for a folder called i386, if this folder is there then close the registry editor and move on to the next bit, if not change the value by double clicking on it and type your cd drive letter, e.g. D:\
Once you have done this go to START > Run> type sfc /scannow note the space between sfc and /scannow.
This will load up a windows file protection window which will check for missing and corrupt core windows files, it is a way of repairing windows without reinstalling it thus you will not have to worry about dealing with your data.
If a window appears asking you for the windows disc make sure the correct version is in the drive and try again, I have found on occasion even with the right version that this does not always work but its certainly worth a try and can repair issues caused by virus’s.
Once you are confident your computer is clean and reliable, then you can do other tests. Try simply unplugging your router for ten seconds and plugging it back in, most routers save the information so your settings will not be lost and it will force the router to reboot and this can often resolve problems.
There other tests that you can try beyond this, if you are still getting slow speeds reply with up to date symptoms and any extra info you can and I will try and help further…
Thanks
Jamie