Whenever I take pics it won't let me rename them

It just started yesterday

Help appreciated
Andrew

Good advice . . . make certain you install the latest v.398

The Irfanview Readme states:
This free image viewer and converter supports an extensive list of formats:
Supported file types:
AIF, ANI/CUR, ASF, AU/SND, AVI, B3D, BMP/DIB, CAM (Casio JPG), CLP, DDS,
Dicom/ACR, DJVU, ECW, EMF/WMF, EPS/PS/PDF, FITS, FlashPix (FPX), FSH, G3, GIF, HDR,
ICO/ICL/EXE/DLL, IFF/LBM, IMG (GEM), JPG2000, JPG, JPM, KDC, LDF, LWF, MED,
MID/RMI, MNG/JNG, MOV, MP3, MPG, MrSID, NLM/NOL/NGG, OGG, PBM/PGM/PPM, PCX/DCX,
PhotoCD, PIC, PNG, PSD, PSP, RAS/SUN, RAW, Real Audio (RA), RLE, SFF, SFW, SGI/RGB,
SWF (Flash/Shockwave), TGA, TIF, TTF, TXT, WAD, WAL, WAV, WBMP, WBZ/WBC, XBM, XPM,
CRW/CR2, DNG, NEF, ORF, RAF, MRW, DCR, SRF, X3F, CAD formats.
Support for Apple QuickTime allows IrfanView to read following formats:
MOV, QTIF, Mac PICT, FLI/FLC
Some features of IrfanView:
Multi language support, thumbnail option, preview option, slideshow,
drag-and-drop support, fast directory view,
batch conversion, e-mail option, audio CD player, print option,
change color depth, scan support, cut/crop, IPTC edit,
effects (sharpen, blur, Adobe Photoshop filters), capturing,
extract icons from EXE/DLL/ICLs, lossless JPG rotation, EXE/SCR creation,
many hotkeys, many command line options, many plug-ins"

As one can see, this means it handles every image-file-format known to man (or woman, if it comes to that)