Downloading all types of free software
Do not download any and every type of program or application just because it is free. Make sure the source of the software can be trusted. Use the internet to seek advice about the software you want to download and find out about its source.

Opening all e-mail attachments
Do you open all attachments sent with e-mails, even if you do not know the sender of the e-mail? Well, irrespective of whether you know the sender or not, pause before you open an attachment. While Word, Excel, Txt files are almost harmless, other files, when downloaded, could harm your system. Never open a file that has an extension of .exe or .bat. Make sure you scan your attachment for viruses before opening it.

Clicking all kinds of links available in e-mails
E-mails containing advertisements have several links in them. Do not unnecessarily click the links. If the source of the e-mail is not trustworthy, you may end up visiting websites that will harm your computer.

Divulging personal and financial information on websites
These days, several e-mails reach our mailbox asking us to confirm our credit card information, social security number etc on genuine looking websites. However, these websites are fake; they cheat us into revealing important information. This information can be misused later. This type of cheating through fake websites is called phishing. Notify your bank or financial institution if its website has a duplicate cheating people on the internet.

Hitting the OK button on all online pop-ups
Some online pop-ups are difficult to ignore. They may come with a warning that says: Your computer is not secure. Remember, most of the online pop-ups are advertisements, and some of these are malicious. It is better to close such kinds of pop-ups.

Despite taking utmost care of the computer, it falls prey to problems. If computer repair is not your cup of tea, call the mobile computer doctors. Just a call away, these doctors will reach your doorstep in a jiffy.