Your computer is more vulnerable to viruses and malware because Microsoft no longer patches security holes in this version.
Be extremely cautious of third-party sites offering "free full versions" or "cracked" keys. These downloads often contain hidden malware or ransomware. 3. Better (and Safer) Free Alternatives Microsoft Office 2010 Free Download
Yes, but only if you already own it. To install Office 2010 legally today, you generally need two things: Your computer is more vulnerable to viruses and