I don't think Windows Defender would start in Safe Mode, but it can be disabled ( I do it). There is both a startup for it in msconfig > Startups, and a service for it in the services tab. (I disable that by running
services.msc, locate "Windows Defender", set the service to disabled and restart)
And I don't think the DVD filters are the issue, but if you want to give this a shot, you can >>
http://support.microsoft.com/kb/929461/en-us
However I have some more questions. Ignore the ones you have obviously answered.
Pay special attention to Item 6 in this list, there is a link to an article there, download and run the script you see linked to on that site anyway. To download it you must right click and use the "save target as" method. You must see a VBS script, not a text file.
PERFORMANCE QUESTIONS:
0 > when did the problem seem to be begin?
1 > is it very slow to boot up?
2 > do programs open slowly?
3 > does the same behavior occur both on and off the internet. Or with no connection at all?
4 > does it matter how long the system has been on, and does a restart improve things?
Slow performance issues can often be due to overheating, so if the system is faster after it has been shutdown for a while and then restarted -- that would be especially suspect. To check for possible problems here, shutdown, open the case and blow out any accumulated dust. Then turn it
on and check to see that the fan is working. Sometimes it helps to physically clean the fan.
If a laptop, check to see that the vent is clear of dust and verify the fan is working. Temps and fan speed can usually be monitored with
SpeedFan (except on Dell desktops), a free utility.
5 > if you do a ctrl-alt-del, do any processes show excess cpu usage, other than System Idle Process?
6 > If you open the Device Manager (run
devmgmt.msc) and select the entry for IDE ATA/Atapi and select the Primary IDE > Advanced Settings, does it say the "
current transfer mode" is Ultra DMA or PIO?
If it says PIO or even just DMA (rather than “ULTRA” DMA, first ensure "Use DMA if Available” is selected, then select the driver tab and uninstall the driver and reboot. Then check again.
Alternately you can run the script on this page >>
http://winhlp.com/node/10
*note that the above will not apply to RAID drive configurations.
===================
For Vista Users:
With the Task Manager "Performance" tab open, report figure for
Total: (under Physical Memory) this is your total installed ram -- "physical" memory
CPU Usage variable over all processor usage.
Memory variable with current use, expressed as a percent of total at the bottom
Page File -- under the "System" column
>> Also go to the Control Panel > Performance Information and Tools.
What is your "Windows Experience Index"? Run a fresh test of this.What property showed the lowest score?
Open the "Advanced Tools". Do you see anything here flagged as problem performance issues?