There is a big chance that your blog or website contains unusual hidden activity that might harm your computer. You have several ways to check if your blog/website has been compromised and whether or not it contain Malwares or Viruses.
There are tools available for free to scan your own blog/website or any other suspicious websites, such as:
URLVOID: URL VOID is a free service developed by NoVirusThanks company. It permits users to scan the domain or subdomain with multiple scanning engines such as "MyWOT, Google Diagnostic, and Norton SafeWeb" to detect any possible threat from a website.
Online Link Scan: Scan and Detects any hidden links with malicious activity which is hard for the user to notice.
MYWOT: is another service provided by WOT services Ltd, that helps web user to stay safe when visiting other websites.
Google Safe Browsing: a tool where you can check if google has found any malicious activity on a specific website in the last 90 days. When you click on the link you have to type the URL name of the website or blog you want to check just after the "=" equal sign.