[ubuntu] Virtualbox update fails

Section of install log showing errors:

(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 544960 files and directories currently installed.)
Preparing to unpack .../virtualbox-4.3_4.3.26-98988-Ubuntu-raring_amd64 (2).deb ...
dpkg: warning: subprocess old pre-removal script returned error exit status 1
dpkg: trying script from the new package instead ...
dpkg: error processing archive /home/terry/Downloads/virtualbox-4.3_4.3.26-98988-Ubuntu-raring_amd64 (2).deb (--install):
subprocess new pre-removal script returned error exit status 1
Errors were encountered while processing:
/home/terry/Downloads/virtualbox-4.3_4.3.26-98988-Ubuntu-raring_amd64 (2).deb

Any ideas?