Sub-process /usr/bin/dpkg returned an error (1)

[egorka]

@egorka

Updating currently installed packages, please wait…-E: Could not get lock /var/lib/dpkg/lock-frontend - open (11: Resource temporarily unavailable)
E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?

Maybe the reason is that the first attempt to install blocked some resource, and then putty hung, and so hangs?