diff --git a/SmartCardAPP.py b/SmartCardAPP.py
index 273f2d7..c06f027 100644
--- a/SmartCardAPP.py
+++ b/SmartCardAPP.py
@@ -748,7 +748,8 @@ def search():
             file_path = filedialog.askopenfilename(
                 filetypes=[
                     ("PFX Files", "*.pfx;*.p12") if flag == "pfx" \
-                        else ("Cert Files", "*.cer;*.crt;*.pem;*.der;*.p7b")
+                        else ("Cert Chains", "*.p7b")
+                        # else ("Cert Files", "*.cer;*.crt;*.pem;*.der;*.p7b")
                 ]
             )
             if file_path:
diff --git a/request.inf b/request.inf
deleted file mode 100644
index 12b37f9..0000000
--- a/request.inf
+++ /dev/null
@@ -1,15 +0,0 @@
-[Version]
-Signature="$Windows NT$"
-[NewRequest]
-RequestType = PKCS10
-ProviderName = "Microsoft Base Smart Card Crypto Provider"
-ProviderType = 0
-Exportable = FALSE
-MachineKeySet = TRUE
-Subject = "CN=11,2.5.4.15=Private"
-KeySpec = AT_KEYEXCHANGE
-KeyUsage = "0x0000"
-FriendlyName= "11"
-KeyContainer= "C-86357"
-HashAlgorithm= sha256
-KeyLength= 2048