1. Using a free email
reason: Email provide little service to the free email users(even they declare it is a Anti-Virus one)
how to avoid: using a free charge email ,you must install a charged anti-virus soft/
2.using outlook
reason:due to the bugs and hackers
how to avoid: using other mail soft (In China ,we use a freemail -foxmail) instead.
3.surfing by Internet Explorer
reason:due to the bugs & thief &advertiser
how to avoid:apart from E-bank, using firefox
4.downloading software
reason: your own reason...
how to avoid:be far away from sex...