diff --git a/IPython/utils/_process_cli.py b/IPython/utils/_process_cli.py
index eb69d3f..499ee0d 100644
--- a/IPython/utils/_process_cli.py
+++ b/IPython/utils/_process_cli.py
@@ -61,3 +61,13 @@ def getoutput(cmd):
     myError = reg.StandardError
     error = myError.ReadToEnd()
     return output
+
+def check_pid(pid):
+    """
+    Check if a process with the given PID (pid) exists
+    """
+    try:
+        System.Diagnostics.Process.GetProcessById(pid)
+        return True
+    except System.ArgumentException:
+        return False 
diff --git a/IPython/utils/process.py b/IPython/utils/process.py
index 2a19945..64b7254 100644
--- a/IPython/utils/process.py
+++ b/IPython/utils/process.py
@@ -23,7 +23,7 @@ import sys
 if sys.platform == 'win32':
     from ._process_win32 import _find_cmd, system, getoutput, arg_split, check_pid
 elif sys.platform == 'cli':
-    from ._process_cli import _find_cmd, system, getoutput, arg_split
+    from ._process_cli import _find_cmd, system, getoutput, arg_split, check_pid
 else:
     from ._process_posix import _find_cmd, system, getoutput, arg_split, check_pid