Mostly through experimentation and trial-and-error.
From what I've seen, printers, particularly HP printers, are the source of a lot of these sorts of errors. Do you have a wireless printer, or even a printer attached to another computer, that your laptop can use to print things?
You should also uninstall the Comodo antivirus software to see if you still get these errors; antivirus software can also be the source of these errors.
Another thing you can do is to see if there are any errors reported in the event viewed caused by Comodo.
Since you seem uncomfortable with doing this, I'll walk you through it.
Click on the icon at the bottom left-hand side - the windows circle - hover over the "Control Panel" item on the menu and when the detailed menu pops up, click on the "Performance Information and Tools" item.
When the new window opens, on the left hand side there should be an item called "Advanced tools" - click on that item. In the new screen that you get, there should be an item called "View performance details in Event log" - click on that item. In the dialog box saying that Windows need your permission to continue, click "ok."
That will bring up a new window that looks something like this:
(http://i758.photobucket.com/albums/xx221/B_Oceander/GBR/event-viewer-screenshot.png)
On the right-hand side you should see an item called "Find..." - click on that item. In the box that pops up, type "Comodo" - without the quotation marks - and hit return.
It may not find anything, but if it does, in the window in the bottom half of the middle - which is gray - a bunch of text will be displayed. Click on the tab titled "Details" and when the text changes, you should see a number of items with a "+" next to them. Click on each "+" so that it displays all of the information under that item.
Finally, use your cursor to highlight everything displayed in that tab, copy it, and paste it here. Then we can see if that gives us any useful info.