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Error installing modules

Hello! I've been doing python for a couple of months on a different pc and now I've changed .So I'm having a problem installing the modules.Whenever I try ,it gives this error..

C:UsersDell>pip install matplotlib
Collecting matplotlib
  Retrying (Retry(total=4, connect=None, read=None, redirect=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x0490C9D0>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed',))': /simple/matplotlib/
  Retrying (Retry(total=3, connect=None, read=None, redirect=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x0490C950>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed',))': /simple/matplotlib/
  Retrying (Retry(total=2, connect=None, read=None, redirect=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x0490C970>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed',))': /simple/matplotlib/
  Retrying (Retry(total=1, connect=None, read=None, redirect=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x0490CC70>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed',))': /simple/matplotlib/
  Retrying (Retry(total=0, connect=None, read=None, redirect=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x0490CA70>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed',))': /simple/matplotlib/
  Could not find a version that satisfies the requirement matplotlib (from versions: )
No matching distribution found for matplotlib

C:UsersDell>

I've tried with anaconda too there's something else the error but looks similar.I tried it on Pycharm and there also I couldn't install.I see this error message on pycharm,,
Non-zero exit code (1)
Please help so that I can move further.