The main thing you can do is exercise good judgment. What was sent to you was spam, not malware, and there is no program that is going to intercept all spam, especially when it comes from a friend. Now, if it had included an attachment that was some form of malware, and you opened or downloaded it, hopefully your antivirus would have caught it...or it might not have. There are no absolute guarantees with this kind of stuff. Keep your Avast up-to-date and run Malwarebytes and SuperAntispyware regularly.

UPS's constantly monitor the battery and have a small charger built into them to keep the battery juiced perfect. They charge up their batteries after they run down, unless of course the battery has reached its end of life cycle. Some battery types are good for two years, some for longer. Its not a real fast charger, just a little trickle job. The UPS offers surge protection even with a near dead battery. Mine beep like the dickens when their batteries get about 5 years old and one cell dies, as a reminder to go buy some new ones. At power failure every few seconds they beep here - I have several.. its funny - a beep from here where my laptop ac adapter is,, a beep over there on a desktop server, others from behind a door, still another from the router area. Almost like synchronized music that drives me nutty Power failure in the dark of nite - there's so many flashing lights you dont need to worry about bumping into walls.

Computer safety becomes a very personal thing. There are those who run about almost naked while others are so paranoid they get little enjoyment from their machines. I run Avast A/V, Superantispyware, Malwarebytes, Spywareblaster and Zonealarm on one computer. The same on another except I replace Malwarebytes with Spybot Search & Destroy and the MS firewall (which will soon be replaced by PC Tools firewall. On a third computer I loaded Threatfire but cannot comment as the whole computer is giving me a big headache - perhaps that is how I got the P4 for free in the first place, haha.

oh that is bad you have some very serious infections there. Yes that would be your problem for sure. I am going to give you the link to another forum you will have to go to so we can help you run some other scans to fully clean up your computer, we will take it step by step so don't get worried, just stop and ask if you have any questions ok. go to this link, register there, you will have to wait for a reply back, then go to this area for Malware removal and start your own post there or if you prefer I can start if for you. I am there on that forum too, we can get you cleaned up just be patient and do not try to use that computer for anything important or purchase or bank related. Analysis and Malware Removal Ok I will watch for you there, if you have any problems getting there let me know.