Are you sure you need 64 bit 2010?  Are you working with large files? 

2010 Full Download

NOTE: if you do not have the installation file on an “official” MS installation disk, download and save it to your HD. Then you should burn it to one or more DVDs for future use. And at the same time, write down the product key on the DVD. You need both items for future installations, say after your computer crashes and you have re-installed windows. At that point you won’t be able to extract it from the registry and won’t remember where the online account is.

Note: if you buy an Online Download from MS or an authorized reseller, Digital River or a proxy linking to DR, the Product Key and download link are saved in an “Online Account” using on your e-mail address as the log in ID.  The Product key is only kept in the account for 5 years!

Office 2010 / 2007 Download locations -**http://answers.microsoft.com/en-us/office/forum/office\_2010-office\_install/here-are-the-download-locations-for-office-2010/ac67aa2f-dc1c-46f4-8b1d-ca00b3f02a18******

http://office.microsoft.com/en-us/products/microsoft-office-2010-backup-FX101853122.aspx

• Download Backup Buy Backup disk 2010 using Product Key – FPP

http://www.office.com/backup 

• Download Office 2010 Installation Backup. You will need your original Product Key, such as one from a Product Key Card.
• This site is also used if you took advantage of the “Office 2010 Technology Guarantee”, the free “upgrade” offer from 2007 to 2010 for people who bought Office 2007 in the months shortly before 2010 was released.  Although the program expired long ago, this site still provides you access to the product key you were issued and the online download you originally used. See the instructions on this : http://office.microsoft.com/en-us/tech-guarantee/

https://office.microsoft.com/en-us/products/microsoft-office-2010-backup-FX101853122.aspx?redir=0 

• download/backup for Office 2010

www.office.com/downloadoffice

https://office.microsoft.com/en-us/buy/netbook-FX101850729.aspx - Download Office for Netbooks (H&S, H&B, PRO, Standalone Apps)

Direct downloads from Digital River of Trials (you need to have the Product Key already)

http://msft.digitalrivercontent.net/office2010/X17-75058.exe  Office 2010 Professional x86 (English) - X17-75058

http://msft.digitalrivercontent.net/office2010/X17-75161.exe  Office 2010 Professional x64 (English) - X17-75161

Hi Carolyn,

Thank you for posting your question on Microsoft Office Community.

You may refer to the below thread to Download Office 2010 and check if it helps.

http://answers.microsoft.com/en-us/office/forum/office\_2010-office\_install/here-are-the-download-locations-for-office-2010/ac67aa2f-dc1c-46f4-8b1d-ca00b3f02a18

You may also refer to the below Microsoft article to activate and check if it helps.

https://support.office.com/en-us/article/Activate-Office-2010-1fe7340c-50e2-458f-8677-f57f5a140f46?CTT=1&CorrelationId=aaf48a48-532d-4e95-926b-a37637112677&ui=en-US&rs=en-US&ad=US

Hope it helps. Try the suggestions and let us know the result at your earliest convenience.

Thank you.