Restart the PC (clears exhausted buffers), close apps holding many connections (torrent, sync, VPN), reset Winsock and TCP/IP, update the network driver, and remove leftover VPN or security network filters.

What ERR_NO_BUFFER_SPACE means

ERR_NO_BUFFER_SPACE corresponds to WSAENOBUFS: the system couldn't allocate memory for a socket operation. It often builds up over time due to a leak in a network filter driver, which is why a restart fixes it temporarily.

Signs of the problem

  • “ERR_NO_BUFFER_SPACE” in Chrome.
  • Other network apps fail at the same time.
  • Fixes itself after restart, then returns.

Common causes

  • Too many simultaneous connections.
  • VPN, firewall or antivirus network filters leaking resources.
  • Outdated network drivers.

Fixes to try, in order

  1. RestartA full restart clears the exhausted buffers.
  2. Close connection-heavy appsTorrent clients, sync tools, and many open tabs.
  3. Reset Winsock/TCP-IPUse the commands below, then restart Windows.
  4. Update network driverFrom the adapter or PC maker.
  5. Remove VPN/security leftoversUninstall VPNs and old security suites you don't use.

Command

netsh winsock reset
netsh int ip reset
ipconfig /release
ipconfig /renew
ipconfig /flushdns

Elevated Command Prompt; restart afterwards.

How to tell it worked: The error doesn't return after a day of normal use.

Prevent it from coming back

Keep one security product and update network drivers.